YARN-9822.TimelineCollectorWebService#putEntities blocked when ATSV2 HBase is down

[ashutoshcipher]

Description of PR

TimelineCollectorWebService#putEntities blocked when ATSV2 HBase is down

JIRA: YARN-9822

How was this patch tested?

Unit test is added

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 36s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 1s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	15m 45s		Maven dependency ordering for branch
+1 💚	mvninstall	25m 18s		trunk passed
+1 💚	compile	9m 59s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	8m 53s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	2m 21s		trunk passed
+1 💚	mvnsite	5m 23s		trunk passed
+1 💚	javadoc	5m 15s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	4m 54s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	7m 16s		trunk passed
+1 💚	shadedclient	21m 35s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 29s		Maven dependency ordering for patch
+1 💚	mvninstall	2m 18s		the patch passed
+1 💚	compile	9m 7s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	9m 7s		the patch passed
+1 💚	compile	8m 49s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	8m 49s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	2m 6s		the patch passed
+1 💚	mvnsite	4m 40s		the patch passed
+1 💚	javadoc	4m 23s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	4m 15s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	6m 57s		the patch passed
+1 💚	shadedclient	21m 44s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	1m 42s		hadoop-yarn-api in the patch passed.
+1 💚	unit	2m 19s		hadoop-yarn-server-timelineservice in the patch passed.
+1 💚	unit	1m 17s		hadoop-yarn-server-timelineservice-hbase-client in the patch passed.
+1 💚	unit	1m 32s		hadoop-yarn-server-timelineservice-documentstore in the patch passed.
+1 💚	asflicense	1m 20s		The patch does not generate ASF License warnings.
		185m 26s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4492/1/artifact/out/Dockerfile
GITHUB PR	#4492
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 78e2ce2fad4d 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 62f7498
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4492/1/testReport/
Max. process+thread count	554 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-client hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-documentstore U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4492/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[PrabhuJoseph]

Thanks @ashutoshcipher for the patch. Looks good, +1. Will commit it end of day.